Tutorial.UDPSendReceiveString History

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August 13, 2015, at 01:52 PM by Simone Maiocchi -
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Examples > Ethernet Library

Sending and Receiving String via UDP

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  • Arduino Ethernet Shield
  • Shield-compatible Arduino board
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The Ethernet shield allows you to connect a WizNet Ethernet controller to the Arduino via the SPI bus. It uses pins 10, 11, 12, and 13 for the SPI connection to the WizNet. Later models of the Ethernet shield also have an SD Card on board. Digital pin 4 is used to control the slave select pin on the SD card.

The shield should be connected to a network with an ethernet cable. You will need to change the network settings in the program to correspond to your network.

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The Ethernet shield allows you to connect a WizNet Ethernet controller to the Arduino or Genuino boards via the SPI bus. It uses pins 10, 11, 12, and 13 for the SPI connection to the WizNet. Later models of the Ethernet shield also have an SD Card on board. Digital pin 4 is used to control the slave select pin on the SD card.

The shield should be connected to a network with an ethernet cable. You will need to change the network settings in the program to correspond to your network.

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In the above image, your Arduino would be stacked below the Ethernet shield.

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In the above image, the Arduino or Genuino board would be stacked below the Ethernet shield.

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See also


Last revision 2015/08/13 by SM

November 28, 2011, at 04:28 PM by Scott Fitzgerald -
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November 16, 2011, at 05:16 AM by Scott Fitzgerald -
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November 16, 2011, at 05:12 AM by Scott Fitzgerald -
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November 16, 2011, at 04:29 AM by Scott Fitzgerald -
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September 21, 2010, at 06:55 PM by Tom Igoe -
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In this example, you will use your Ethernet Shield and your Arduino to send and receive text strings via the UDP protocol (Universal Datagram Packet).

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In this example, you will use your Ethernet Shield and your Arduino to send and receive text strings via the UDP protocol (Universal Datagram Packet). You'll need another device to send to and from. The Processing sketch included at the end of the code will send to and receive from your Arduino running this example.

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Processing Code

Copy the Processing sketch from the code sample above. When you type any letter in the Processing sketch window, it will send a string to the Arduino via UDP.

September 17, 2010, at 04:37 PM by Tom Igoe -
September 17, 2010, at 04:31 PM by Tom Igoe -
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September 17, 2010, at 04:30 PM by Tom Igoe -
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